余热利用已成为我国国民经济发展中节省能源,提高燃料利用率的最重要途径之一。我国冶金总能耗占国民经济总能耗的13％,有色冶金能耗占全国总能耗的2％,每生产一吨金属可产生约一吨标准煤的余热,各种余热,显热约占总能耗的40～50％,其中200～500℃的中温余热占废气显热的50％,在石油,化工及轻工生产中,中温烟气余热源资极为丰富。这种量大、面广的余热源资可 Waste heat utilization has become one of the most important ways to save energy and increase fuel utilization in our national economy. China’s total metallurgical energy consumption accounts for 13% of the total energy consumption of the national economy, non-ferrous metallurgy energy consumption accounts for 2% of the country’s total energy consumption per ton of metal produced about one ton of standard coal waste heat, a variety of waste heat, sensible heat about Accounting for 40-50% of the total energy consumption, of which 200-500 ℃ of intermediate temperature waste heat accounted for 50% of sensible heat, oil, chemical and light industrial production, medium temperature flue gas heat source is extremely rich. This amount of large, wide range of heat source can be